湖南省岳阳市第一中学2018_2019学年高二化学上学期期中试题(扫描版).doc

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1、1456777岳阳市一中 2018 年下期高二期中考试化学试卷(参考答案)一选择题(共 48 分,每题 3 分,单项选择)1-5 DCCCC 6-10 DCDBC 11-15 BDCCD 16 A二填空题(共 52 分)17.(方程式 2 分,其余每空 1 分,共 6 分)(1)H 2O (2)H 2O2或 N2H4的电子式(略) (3)NH 4NO3 NH4+OH NH3+H 2O (4) 4.48L18. (8 分,每空 2 分)(1)大于 ,1 (2)410 -3mol/(Lmin) 0.6719.(10 分,每空 2 分)(1)H 2C2O4 HC2O4+H+ HC2O4 H+ C2O

2、42(该步也可不写) (2)C 2O42 (3)5H 2C2O4十 2MnO4十 6H+ = 2Mn2+十 10CO2十 8H2O(4)2.7 (5) AC(多选错选均不得分,少选得 1 分)20. (12 分,每空 2 分)(1)铁被钝化 (2)D (3)2MnO 4- + 5SO2 + 2H2O = 5SO42- + 2Mn2+ + 4H+(4)D 中的固体由黑变红、E 中的固体由白变蓝 (5)C2H 2SO4(浓) CO22SO 22H 2O(6)C 21. (10 分,每空 2 分)(1)增大固体的表面积,加快反应速率 (2) cdb (3)B (4)FeO(s)CO(g)= = Fe(s)CO 2(g) H =+7.28kJ/mol (5)33.3%22. (8 分,每空 2 分)(1)9:2 (2)10:1 (3)1:49

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